Assessing uncertainties in a simple and cheap experiment

Souza, P. A. de; Brasil, Gutemberg Hespanha

doi:10.1088/0143-0807/30/3/018

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The prime objective of this manuscript was to develop a Punch-O-Meter device, characterize it and test its feasibility for measuring both the force and the speed of a punch, simultaneously. The next step will be to test the device from a biomechanical point of view in a large population following the protocol described in previous research [28], which requires Institutional Review Board (IRB) approval. We have already started acquiring IRB approval for this study, and approval is pending.…”

Section: Discussionmentioning

confidence: 99%

Development of a Punch-O-Meter for Sport Karate Training

2019

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In karate sparring (kumite), punches are used more than kicks to score points. Among these punches, gyaku tsuki is a very commonly used punch. The objective of the punch is to hit the target at a medium range in a very short time, producing a maximum force. In this study, we proposed the development of a novel standalone Punch-O-Meter system to measure the speed and the force generated by a punch.

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Section: Discussionmentioning

confidence: 99%

Development of a Punch-O-Meter for Sport Karate Training

2019

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“…For the sake of clarity, the coefficient of variation (CV), proposed in [29] has also been evaluated. It is defined as:…”

Section: Numerical Test With Noise and Quantizationmentioning

confidence: 99%

An Optimized HT-Based Method for the Analysis of Inter-Area Oscillations on Electrical Systems

et al. 2019

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The paper deals with a novel method to measure inter-area oscillations, i.e., electromechanical oscillations involving groups of generators geographically distant from one another and ranging within the frequency interval from 0.1 Hz up to 1 Hz. The estimation of the parameters characterizing inter-area oscillations is a crucial objective in order to take the necessary actions to avoid the instability of the transmission electrical system. The proposed approach is a signal-based method, which uses samples of electrical signals acquired by the phasor measurement unit (PMU) and processes them to extract the individual oscillations and, for each of them, determine their characteristic parameters such as frequency and damping. The method is based on Hilbert transformations, but it is optimized through further algorithms aiming at (i) improving the ability to separate different oscillatory components, even at frequencies very close to each other, (ii) enhancing the accuracy associated with the damping estimates of each oscillation, and (iii) increasing the robustness to the noise affecting the acquired signal. Results obtained in the presence of signals involving the composition of two oscillations, whose damping and frequency have been varied, are presented. Tests were conducted with signals either synthesized in simulated experiment or generated and acquired with actual laboratory instrumentation.

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“…Following the prescription of Ref. [18], we randomized the order of the trials in each experiment to minimize measurement biases due to these effects. Randomized trials were altered to avoid repetition of the same values of m and ∆T on successive trials.…”

Section: Elastic Massive Wirementioning

confidence: 99%

Uncertainty analysis for a simple thermal expansion experiment

Dounas-Frazer

Iwata

Gandhi

2013

American Journal of Physics

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We describe a simple experiment for measuring the thermal expansion coefficient of a metal wire and discuss how the experiment can be used as a tool for exploring the interplay of measurement uncertainty and scientific models. In particular, we probe the regimes of applicability of three models of the wire: stiff and massless, elastic and massless, and elastic and massive. Using both analytical and empirical techniques, we present the conditions under which the wire's mass and elasticity can be neglected. By accounting for these effects, we measure nichrome's thermal expansion coefficient to be 17.1(1.3) µm/m·K, which is consistent with the accepted value at the 8% level.

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Assessing uncertainties in a simple and cheap experiment

Cited by 7 publications

References 4 publications

Development of a Punch-O-Meter for Sport Karate Training

Development of a Punch-O-Meter for Sport Karate Training

An Optimized HT-Based Method for the Analysis of Inter-Area Oscillations on Electrical Systems

Uncertainty analysis for a simple thermal expansion experiment

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